I'd think so too, but I have arranged the airflow so that the front fan directly exhausts the heat from the front of the GPU out of the case, while the top fan is used as an intake (the CPU radiator is located on the rear exhaust and used as an intake, but it never spins above 1500~ RPM even under the most extreme load.

My concern was the wattage, and you've just verified my thoughts that the PSU has more than enough grunt for the setup, thanks

Oh, you put hot air off the CPU rad into case. Good for CPU, bad for every other component in the system. You may damage VRMs on your MB and VC that way.

Make front fan intake, up its RPMs, all others should push air out, including CPU rad fan. Your goal is to make air inside your case cooler.